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   <div id="projectname">CMSIS-FreeRTOS
   &#160;<span id="projectnumber">Version 9.0.0</span>
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   <div id="projectbrief">CMSIS-RTOS2 compliant FreeRTOS Implementation</div>
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<div class="title">Introduction </div>  </div>
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<div class="textblock"><p><a href="http://www.freertos.org/" target="_blank">FreeRTOS</a> is one of the market leading real-time operating systems (RTOS) for embedded microcontrollers. It is professionally developed, <a href="http://www.freertos.org/FreeRTOS-Coding-Standard-and-Style-Guide.html" target="_blank">strictly quality controlled</a>, robust, <a href="http://www.freertos.org/FreeRTOS_Support_Forum_Archive/freertos_support_forum_archive_index.html" target="_blank">supported</a>, free to <a href="http://www.freertos.org/a00114.html" target="_blank">use in commercial products</a> without a requirement to expose proprietary source code, and has <a href="http://www.freertos.org/differences-between-officially-supported-and-contributed-FreeRTOS-code.html" target="_blank">no IP infringement</a> risk.</p>
<p><a href="https://arm-software.github.io/CMSIS_5/RTOS2/html/index.html"><b>CMSIS-RTOS v2</b></a> is a common API for real-time operating systems (RTOS). It provides a standardized programming interface that is portable to many RTOS and enables software components that can work across multiple RTOS systems. It supports the ARMv8-M architecture, dynamic object creation, for multi-core systems, and has a binary compatible interface across ABI compliant compilers.</p>
<p>Using this software pack, users can choose between a native FreeRTOS implementation or one that is adhering to the CMSIS-RTOS2 API and using FreeRTOS under the hood. The CMSIS-RTOS2 API enables programmers to create portable application code to be used with different RTOS kernels (for example <a href="http://www.keil.com/mdk5/cmsis/rtx" class="el">Keil RTX5</a>).</p>
<p><b>Note:</b> FreeRTOS does not support ARM Compiler v6, yet! Please refere to the <a href="http://www.freertos.org/FreeRTOS_Support_Forum_Archive/May_2016/freertos_Anyone_Working_on_a_Port_to_Keil_ARM_Compiler_6.4_ARMCLANG_9deb244ej.html" target="_blank">FreeRTOS Support Archive.</a></p>
<p>This documentation shows you:</p>
<ul>
<li>how to <a class="el" href="cre_freertos_proj.html">create a new microcontroller project</a> using FreeRTOS from scratch.</li>
<li>Various <a class="el" href="examples.html">Example projects</a> show you the usage of FreeRTOS in native and CMSIS-RTOS2 mode.</li>
<li>the <a class="el" href="tech_data.html">Technical data and limitations</a> of this implementation.</li>
</ul>
<h1><a class="anchor" id="License"></a>
License</h1>
<p>The CMSIS-FreeRTOS implementation is provided free of charge by ARM under the <a href="license.txt">FreeRTOS license</a>.</p>
<h1><a class="anchor" id="CMFR_Pack_Content"></a>
ARM::CMSIS-FreeRTOS Pack</h1>
<p>The <b>ARM::CMSIS-FreeRTOS</b> pack contains the following:</p>
<table class="doxtable">
<tr>
<th align="left">File/Directory </th><th align="left">Content  </th></tr>
<tr>
<td align="left"><b>ARM.CMSIS-FreeRTOS.pdsc</b> </td><td align="left">Package description file in CMSIS-Pack format. </td></tr>
<tr>
<td align="left"><b>License</b> </td><td align="left">FreeRTOS license agreement. </td></tr>
<tr>
<td align="left"><b>CMSIS</b> </td><td align="left">CMSIS-RTOS2 compliant implementation of FreeRTOS. </td></tr>
<tr>
<td align="left"><b>Config</b> </td><td align="left">FreeRTOS configuration header file. </td></tr>
<tr>
<td align="left"><b>Demo</b> </td><td align="left">FreeRTOS demo projects. </td></tr>
<tr>
<td align="left"><b>Documentation</b> </td><td align="left">This documentation. </td></tr>
<tr>
<td align="left"><b>DoxyGen</b> </td><td align="left">Source of the documentation. </td></tr>
<tr>
<td align="left"><b>Source</b> </td><td align="left">FreeRTOS source code. </td></tr>
<tr>
<td align="left"><b>Utilities</b> </td><td align="left">Utilities to build the pack. </td></tr>
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